Should flavours be banned in cigarettes and e cigarettes? Evidence on adult smokers and recent quitters from a discrete choice experiment Tobacco Control A Review of Toxicity Mechanism Studies of Electronic Cigarettes on Respiratory System E cigarettes may cause epigenetic changes E cigarettes proving to be a danger to teens Schoolchildren who use e cigarettes more likely to try tobacco University of Leeds New E Cigarette Laws Could Drive Some Users to Smoke More Cigarettes Duke Health